"...and I already know as much as they do?"
This brings up a very universal issue. When it comes to getting mentors, while it's great to have mentors who are doing what you want to be doing already, if you are in this person's position, at the same level, they're not the type of mentor you need.
In this case you'd be seeking out business advice and guidance from either:
1. The classification of people who hire you (so unless you know everybody who hires your classification, this type is good for you)
2. Any parallel classification who gets hired by the same classification as you. For example: If you're an Editor, a parallel classification (ones who also get hired by producers and directors) would be a DP, Production Designer, Actor, Writer, Key Hair & Makeup, etc. Why? Because if they are successful, they can give you advice on what they do. You're all in the same boat, just different classifications.
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